(19)

(11)

EP 1 773 488 A2

(12)

(88) Date of publication A3: 01.06.2006 (43) Date of publication: 18.04.2007 Bulletin 2007/16 (21) Application number: 05785085.1 (22) Date of filing: 22.06.2005

(51) International Patent Classification (IPC):  B01J 27/22(2006.01) H01M 4/96(2006.01) B01J 23/40(2006.01) B01J 37/08(2006.01) H01M 4/92(2006.01) H01M 4/88(2006.01) B01J 21/18(2006.01) (86) International application number: PCT/US2005/022043 (87) International publication number: WO 2006/002228 (05.01.2006 Gazette 2006/01)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR (30) Priority: 22.06.2004 US 873760 (71) Applicant: Ballard Power Systems Inc. Burnaby, BC V5J 5J8 (CA)	(72) Inventor: CAMPBELL, Stephen, A. Maple Ridge, British Columbia V4R 2E6 (CA) (74) Representative: Beyer, Andreas  Wuesthoff & Wuesthoff Patent- und Rechtsanwälte Schweigerstrasse 2 81541 München 81541 München (DE)